Selfless Acts Of Altruism: Why Does Altruism Occur?

Altruism is theorized to be grounded on three perspectives, suggesting altruism is based on aggression, evolution, or altruistic behavior. In addition, four main theories exist that describe how acts of altruism occur. If altruism is behavior derived from an evolutionary standpoint, acts of altruism essentially hold some genetic basis in humans. Why is there an aversion towards certain “selfless” acts of altruism? Considering ancestral humans lived and thrived in social groups, would it not have been beneficial for selfless behavior to be encouraged rather than discouraged. In the case of the man who desired to donate both his second kidney, an act that would cost him his life, would evolution not encourage his behavior and the mentality of